Inlet valve of internal combustion engines



June 30, 1931. J. GARDNER ET AL 1,812,262

INLET VALVE OF INTERNAL COMBUSTION ENGINES Filed May 10, 1930 (NVINF008,

Patented June 30, 1931 UNITED STATES P TE noFl-" ca5 JOSEPH GADDNER ANDJOSEPH HUGH S'IOT'I. GARDNER,-OF PATBICROF'I', NEAR IAN- CHESTER,ENGLAND, ABSIGNORS TO L. GARDNER & SONS LIMITED, 01 PATRICROI'T, NEARMANCHESTER, ENGLAND, A BRITISH COMPANY a l a mnm' vanvn OFINTERNALcomiausrrou ENGINES Application filed m 10, 1930, Serial no.'451,4es,and iirGreat man ctobet 1a, 1929.

This invention relates to the inlet valves 8e 'Such bafile or raisedportion may be hollowed internal combustion engines, and has for itsobject to provide improved means for 1ncreasing the turbulence withinthe engine cyl- 1 inder or cylinders during and. after admission throughthe said valves.

It is known to provide a projecting wall which extends partly aroundthe'edge of one side of an inlet valve, such wall being within 10 thevalveway so that it obstructs the flow through the valveway at its sideof the valve and increases turbulence in the engine cylinder.

In accordance with our invention, the means which obstruct thethroughway at one side of an inlet valve consist of a raisedplatform-like partwhich extends inwards from the valve edge to the valvestem so as to provide a directing path across the valveback to the partof the valve edge where the air or charge can issue into the engine. Theinlet branch leading to the valve is so disposed as to direct the chargeover the said platform to the other side-of the valve, and the clearances ace around the valve and in the cylinder ore is made to increase fromadjacent to the part of the valve where the said plat form is situatedso that increased clearance is provided where the air or charge issuesso through the valve.

Referring to the accompanying sheet of explanatory drawings Figure 1 isa sectional elevation through an engine cylinder block on the line A B Cof Figure 2 and through the cylinder head on the A B D of Figure 2, thevalve being shown in elevation.

Figure 2-is a plan view of the cylinder block with the valve shown inposition and 40 the direction of the inlet branch leading to said valvebeing indicated.

Figure 3 is a sectional view of the valve on the line D B E of Figure 2.

v The same reference letters in the three views indicate the same parts.

The inlet valve a has a bafile 12 arranged upon the back thereof whichextends round a portion of the valve and inwards towards the valve stem0 so as to provide a raised portion at one side of the back of the alve.

out at d by'machiningto, reduce the wei ht of the valve as shown inFigures lan 3. The axial depth of the bafiie b is greaterthan the strokeof the valve so that no throughway is ever available at the side of the.valve where the baflie is situated. The inlet branch 0 which leads tothe inlet valve (1 is so directed "only pass in a forwarddirection intothe cylinder to produce the swirling motion and can not pass thereininsuch' a wa as to oppose or retard the swirling airor c arge.

Toprovide a large area around the valve 1 for the passage of air or thecharge intothe cylinder 9 in the desired direction, we make theclearancespaceh in the c linder bore around the valve of .excentricormation as shown in Figure 2, the space graduallyin creasing fromadjacent to the part of the valve where the baflle b is situated andbeing completed at i .in a direction tangential to the cylinder bore.Such shapingof the clearance space also assists in the productionofturbulence during the period of admission,

the turbulencecontinuing during compression. 1 e I i We find thattheprovision of a raised platform like. part b attheback of one side of thevalve serves in an effective mannerto direct the incoming air orchargeto the unshielded or unbafiled side of the valve, whilst the, dis- Thebaflle may, if, desired, b seated 'to the rear of the valveinsteadof'being made integrally therewith.

Claims 1. An inlet valve of an internal combustion engine having araised platform like part at one side of the back of the valve in orderto provide a permanent closure for that side of the valve throughway andto direct the incoming air or charge to the unshielded or unbafiled sideof the valve.

2. The combination with an inlet valve as claimed in claim 1, of aclearance s ace around the valve in the engine cylinder ore whichincreases from adjacent to the shielded side of the valve.

3. Air or charge inlet arrangements ofeinternal combustion enginescomprising an ini let valve havin a hollow raised platformlike partformed integrally therewith at one side of the back of the valve, aninlet branch directing the incoming air or charge to the other side ofthe back of the valve, and a clearance space in the engine cylinder boreof excentric shape relatively to the valve, such space increasing fromadjacent to the platform side of the valve and terminating with its walltangential to the cylinder wall.

4. Air or charge inletarrangements of internal combustion engines,comprising an inlet valve having shielding means thereon for obstructingthe flow through the valveway at one side of the valve when the latteris opened,

and a clearance space in the engine cylinder bore around a portion ofthe valve periphery, such space increasing from adjacent to the shieldedside of the valve.

5. Air or charge inlet arrangements of internal combustion enginescomprising the combination with a cylinder of the engine of an inletvalve disposed partly in the cylinder bore and partly in a pocket orclearance space in the cylinder wall, a projecting shield at one side ofthe back of the valve obstructing the flow through the valveway at oneside of the valve when the latter is opened, the said pocket being ofexcentric form with relation to the valve and providing a graduallyincreasing space from adjacent to the said shield.

6. Air or charge inlet arrangements of internal combustion. enginescomprising the combination with a cylinder of the engine of an inletvalve dis osed partly in the cylinder bore and part y in a pocket orclearance space in\the c linder wall a projecting shield at one side ofthe back 0% the valve, the said pocket being of excentric form withrelation to the valve and providing a gradually increasing space fromadjacent to the shield, the pocket terminating with its wall tangentialto the engine cylinder wall.

In testimony whereof we have signed our names to this s cification.

JOSEPH G RDNER.

JOSEPH HUGH STOTT GARDNER.

